“This season we’ve had great success with our new hit series The Originals paired with Supernatural, giving us our best Tuesday nights in years,” said CW prez Mark Pedowitz in a statement. “The Vampire Diaries is No. 2 in its time period in the young adult demos, and with Arrow continuing to gain among young men, and Reign growing its time period, we now have strong nights on Tuesday, Wednesday and Thursday. I’m very pleased to announce early pickups for all five series, and let our fans…